Engine exhaust, industry, domestic heating, volcanic eruptions are all sources of: a) ozone b) sulfur dioxide c) carbon dioxide d) cfcs

I think the answer is A.

The lungs are the bags that hold air as it is inhaled oxygen gas that is in the air moved into the blood-and the heart pumps to move this oxygenated blood to cells in the body that need energy

Answer up to 6,000 fatal crashes a year;